/Engine/Plugins/Experimental/ChaosClothAsset/Source/ChaosClothAsset/Public/ChaosClothAsset/CollectionClothSelectionFacade.h
Create a new Selection in the collection with the given name and return its index. If a Selection with the name already exists, return the index of the existing selection.
The previous number of Selections if we added a new Selection, or the index of the Selection with the given Name if it already existed, or INDEX_NONE if the schema for this facade object is not valid.
int32 FindOrAddSelection ( const [FString](API\Runtime\Core\Containers\FString) & Name )